CN220917168U - Water dispenser - Google Patents

Abstract

The utility model provides a water dispenser, which is provided with a water inlet and a hot water outlet, and comprises: the first instant heating unit comprises a first instant heating cavity and a heat pump, and the heat pump is used for heating the first instant heating cavity; and the second instant heating unit comprises a second instant heating cavity and an electric heating body, wherein the electric heating body is used for heating the second instant heating cavity, and the first instant heating cavity and the second instant heating cavity are sequentially connected in series on a hot water pipeline between the water inlet and the hot water outlet. The hot water storage device does not need to be provided with a larger water storage container, is smaller in size, provides hot water with the temperature close to the expected water taking temperature immediately when a user takes the hot water, and is good in user experience.

Description

Water dispenser

Technical Field

The utility model relates to the field of water dispensers, in particular to a water dispenser comprising a heat pump.

Background

The heat pump is a high-efficiency energy-saving device which fully utilizes low-quality heat energy. The working principle of the heat pump is a mechanical device which forces heat to flow from a low-temperature object to a high-temperature object in a reverse circulation mode, only a small amount of reverse circulation net work is consumed, larger heat supply can be obtained, and low-grade heat energy which is difficult to apply can be effectively utilized to achieve the purpose of energy conservation. The prior art has examples of applying heat pumps to water dispensers to provide hot water.

The water dispenser is provided with a hot water tank and a boiled water tank which are positioned at the same height and have similar volumes, and the hot water tank and the boiled water tank are communicated through a communication pipeline to form a communicating vessel. After the water in the hot water tank is preheated to a preset temperature by the heat pump, the electromagnetic valve on the communicating pipeline is opened, and the preheated water in the hot water tank can be automatically injected into the water tank. When the water levels in the two water tanks are equal in height, the electromagnetic valve is closed. The electric heating tube in the boiled water tank can continuously heat the preheated water. At the same time, new normal temperature water is injected into the hot water tank, and this portion of the normal temperature water is mixed with the remaining preheated water in the hot water tank and heated to a predetermined temperature by the heat pump, and supplied to the boiled water tank. By repeating the steps, boiled water can be continuously provided.

Such a water dispenser, although using a heat pump to improve heat efficiency, requires a hot water tank having a large volume, and can be provided to a user at one time when the user takes boiled water. Because the hot water tank can only transport half volume of water to the boiled water tank each time, if the volume of the hot water tank is less, after the boiled water in the boiled water tank is emptied by a user, the hot water tank supplements water to the boiled water tank again, and the preheated water newly supplemented to the boiled water tank needs enough heating time to be heated into boiled water, so that the user needs to wait. Moreover, in this design, the hot water tank and the boiled water tank are integrated together, and similar to the separation of the hot water tank and the boiled water tank by the partition plate in one tank, it is possible that in order to make the tank have a regular shape, the hot water tank and the boiled water tank have a cross-sectional area and a height which are almost the same, resulting in a larger volume of the tank and thus a larger volume of the water fountain.

Disclosure of utility model

In order to at least partially solve the problems of the prior art, some embodiments of the present utility model provide a water dispenser having a water inlet and a hot water outlet, the water dispenser comprising: the first instant heating unit comprises a first instant heating cavity and a heat pump, and the heat pump is used for heating the first instant heating cavity; and the second instant heating unit comprises a second instant heating cavity and an electric heating body, wherein the electric heating body is used for heating the second instant heating cavity, and the first instant heating cavity and the second instant heating cavity are sequentially connected in series on a hot water pipeline between the water inlet and the hot water outlet.

According to the technical scheme, compared with the existing heat pump type water dispenser in the market, the water dispenser disclosed by the application has the advantages that a larger water storage container is not needed, and the volume is smaller. The instant heating device can continuously heat water with relatively constant flow into constant-temperature hot water, so that the first instant heating cavity and the second instant heating cavity are not required to be particularly large as long as a water source normally continuously supplies water no matter the first instant heating unit or the second instant heating unit. In addition, by arranging the first instant heating unit for heating by the heat pump at the upstream of the second instant heating unit for heating by the electric heating body, the characteristic that the heat pump has higher heat efficiency under the condition of lower temperature difference can be fully utilized, and the heat pump can heat the normal-temperature water with larger flow rate into the preheated water with larger temperature and then convey the preheated water to the second instant heating unit. Thus, the water with larger flow and higher temperature can be output, even boiled water, without increasing the whole power. In addition, when the temperature of hot water generated by the heat pump just started is insufficient, the second instant heating unit can directly heat normal-temperature water into boiled water, and at the moment, the water flow can be reduced and/or the power of the second instant heating unit can be improved, so that hot water with the temperature close to the expected water taking temperature can be provided immediately when a user takes the hot water, and the user experience is good.

Illustratively, the heat pump includes: an evaporator; the condenser can exchange heat with the first instant heating cavity, the outlet of the evaporator is communicated with the inlet of the condenser through a first pipeline section, and the outlet of the condenser is communicated with the inlet of the evaporator through a second pipeline section; and a compressor disposed on the first pipe section. In the technical scheme, the mechanical heat pump is adopted, the service life of the mechanical heat pump is longer than that of the semiconductor heat pump, the maintenance cost is lower, the refrigerating efficiency is high, and the user experience can be improved.

Illustratively, the water dispenser further includes a heat dissipating fan, the heat dissipating fan comprising: the air outlet end of the first cooling fan faces the condenser. The first cooling fan is arranged, and the air outlet end of the first cooling fan faces the condenser, so that the water temperature in the first instant heating cavity can be effectively prevented from being too high. In the case where the evaporator is used for refrigerating the cold tank, the refrigerating efficiency can also be improved.

The water dispenser further comprises a second cooling fan, wherein the first air heat exchanger is arranged on the first pipeline section, and the air outlet end of the second cooling fan faces to the first air heat exchanger. The second cooling fan is arranged, and the air outlet end of the second cooling fan faces the first air heat exchanger arranged on the first pipeline section, so that the water temperature in the first instant heating cavity can be effectively prevented from being too high. In the case where the evaporator is used for refrigerating the cold tank, the refrigerating efficiency can also be improved.

Illustratively, the water dispenser further includes a heat absorbing fan, the heat absorbing fan including: the air outlet end of the first heat absorption fan faces the evaporator, and the air outlet end of the first heat absorption fan faces the evaporator, so that the water temperature in the cold tank can be effectively prevented from being frozen too low, and the heating efficiency can be improved.

Illustratively, or a second heat absorption fan, a second air heat exchanger is arranged on the second pipeline section, and the air outlet end of the second heat absorption fan faces the second air heat exchanger. The second heat absorption fan is arranged, the air outlet end of the second heat absorption fan faces the second air heat exchanger arranged on the second pipeline section, so that the too low freezing of the water temperature in the cold tank can be effectively avoided, and the heating efficiency can be improved.

Illustratively, the water dispenser further has a cold water outlet, the water dispenser further comprising a cold tank connected between the water inlet and the cold water outlet, the evaporator being in heat exchange relationship with the cold tank. Heat is transferred from the water in the cold tank to the water in the first instant heating cavity, hot water can be produced faster, cold water in the cold tank can be provided for a user through the cold water outlet, and user experience is enriched.

Illustratively, the first instant heating unit includes an inner tube and an outer tube sleeved over the inner tube, the outer tube and the inner tube being spaced apart and forming an interlayer, one of the inner tube and the interlayer forming a first instant cavity, the other of the inner tube and the interlayer forming a condenser. The inner layer pipe and the outer layer pipe are designed, so that the contact area of working medium and water can be greatly increased, the heating is more sufficient, and the efficiency is higher. The problem of cold and hot water interference can also be avoided, and the water outlet temperature is more stable.

Illustratively, the first instant heating unit includes an instant container, the space within the instant container forming a first instant cavity. The instant heating container is arranged, so that the water to be heated and the condenser can always have sufficient contact area, and the heating efficiency is improved. Or the inner surface of the instant heating container has a larger contact area with water therein, so that the heating efficiency can be ensured as well.

Illustratively, the volume of the instant hot vessel is less than or equal to 1 liter. Compared with the heating capacity of the heat pump, the water can be quickly heated to a higher temperature, so that the demand of users on demand can be met.

Illustratively, the outlet of the instant heating vessel is located at the top thereof. The water outlet is arranged at the top, so that the influence on the heating effect and even dry heating caused by the fact that water in the instant heating container cannot be filled can be avoided. And the stability of the output water temperature can be ensured to a certain extent.

Illustratively, the water dispenser further comprises a filter assembly, the purified water outlet of the filter assembly being connected to the water inlet.

In the above technical scheme, the filter assembly can filter raw water and then convey the raw water to the water inlet, and then the raw water is heated to the expected water taking temperature by the first instant heating unit and the second instant heating unit and then provided for a user. Thus, the water dispenser can continuously and largely provide the purified water with the expected water taking temperature for users, and the user experience is better.

Illustratively, the water dispenser further comprises: the pumping device with adjustable flow is arranged on a hot water pipeline between the water inlet and the first instant heating cavity or between the first instant heating cavity and the second instant heating cavity; and the controller is used for adjusting the output flow of the pumping device, the power of the heat pump and/or the power of the electric heating body according to the expected water taking temperature.

In the technical scheme, the water dispenser can accurately control the water temperature of the hot water conveyed to the user from the beginning of water taking of the user to the end of water taking, and the hot water can be continuously supplied.

Illustratively, in the case where the pumping means is disposed on the conduit between the water inlet and the first instant heating chamber, the water dispenser further comprises a zero pressure valve disposed between the water inlet and the pumping means. The zero-pressure valve is arranged at the water inlet of the pumping device, so that the pumping device can regulate water flow more accurately.

The water dispenser further comprises a return line, wherein a water inlet of the return line is connected to the water inlet, and a water outlet of the return line is connected to a water inlet of the filter assembly. The technical scheme can effectively reduce the system pressure and protect the filter assembly.

Illustratively, in the case where the pumping device is disposed on a pipeline between the first instant heating cavity and the second instant heating cavity, the water dispenser further includes a water replenishment tank communicated between the water purification outlet and the water inlet of the filter assembly, the water replenishment tank being located above the first instant heating cavity. The water supplementing tank can quickly supplement purified water to the water inlet, and the water supplementing tank can supplement water by gravity, so that the cost is low.

Illustratively, the water dispenser further comprises a flow meter arranged on the hot water pipeline between the water inlet and the hot water outlet, the flow meter is electrically connected with the controller, and the controller is further used for adjusting the output flow of the pumping device according to the detection result of the flow meter. The flowmeter is arranged for accurately determining the flow, and forms closed-loop control with the pumping device, so that the accurate adjustment of the flow of the hot water is realized.

The flow meter is typically arranged between the first and second instant heating units and closer to the second instant heating unit than the pumping means. Like this, can detect the flow that enters into the second instant heating unit accurately, and then can control the power of second instant heating unit accurately, and then realize the purpose of accurate accuse temperature.

Illustratively, the water dispenser further comprises a temperature sensor assembly comprising a first temperature sensor for detecting the water temperature in the first instant heating chamber, a second temperature sensor for detecting the water temperature in the second instant heating chamber, a third temperature sensor for detecting the water temperature in the conduit between the first instant heating chamber and the second instant heating chamber, and/or a fourth temperature sensor for detecting the water temperature in the conduit downstream of the second instant heating chamber, the controller further being adapted to adjust the output flow of the pumping means, the power of the heat pump and/or the power of the electric heating body depending on the water temperature measured by the temperature sensor assembly. The controller may be used to adjust the output flow of the pumping device, the power of the heat pump and/or the power of the electric heater in real time based on the temperature measured by the temperature sensor assembly. Thereby ensuring that the temperature of the output hot water is more accurate.

Illustratively, the water dispenser further comprises a heating tap in which the second instant heating unit is disposed. The water tank is nearest to the hot water outlet, water can reach the water taking container of a user immediately after being heated, and heat loss caused by longer transmission process can be avoided; the second instant heating unit hardly holds water with lower temperature, and the user receives basically all hot water with the desired water taking temperature; if the second instant heating unit fails, the maintenance and replacement are easier. Part of the heating faucet is a standard part, and can be directly purchased and replaced when damaged.

In the summary, a series of concepts in a simplified form are introduced, which will be further described in detail in the detailed description section. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

Advantages and features of the utility model are described in detail below with reference to the accompanying drawings.

Drawings

The following drawings are included to provide an understanding of the utility model and are incorporated in and constitute a part of this specification. Embodiments of the present utility model and their description are shown in the drawings to explain the principles of the utility model. In the drawings of which there are shown,

FIG. 1 is a waterway diagram of a water dispenser according to an exemplary embodiment of the present utility model;

Fig. 2 is a perspective view of an outer layer tube and an inner layer tube of a first instant heating chamber according to an exemplary embodiment of the present utility model;

FIG. 3 is a cross-sectional view of FIG. 2;

fig. 4 is a waterway diagram of a water dispenser according to another exemplary embodiment of the present utility model.

Wherein the above figures include the following reference numerals:

11. A water inlet; 12. a hot water outlet; 13. a normal temperature water outlet; 14. a cold water outlet; 15. a water outlet; 100. a first instant heating unit; 110. an instant heating container; 111. a water inlet of the instant heating container; 112. a water outlet of the instant heating container; 113. a first temperature sensor; 120. a heat pump; 121. an evaporator; 122. a condenser; 1221. an inlet of the condenser; 1222. an outlet of the condenser; 123. a first pipe section; 124. a second pipe section; 125. a compressor; 126. a first heat radiation fan; 127. a first heat absorption fan; 128. an expansion valve; 130. an inner layer tube; 140. an outer layer tube; 150. an interlayer; 151. a water inlet port; 152. a water outlet interface; 200. a second instant heating unit; 300. a cold tank; 400. 400', a filter assembly; 401. a water inlet of the filter assembly; 420. a booster pump; 430. a reverse osmosis filter element; 440. a return line; 450. a return valve; 500. a hot water pipeline; 510. a pumping device; 520. a zero pressure valve; 530. a flow meter; 540. a third temperature sensor; 550. a fourth temperature sensor; 600. a filter element is arranged in front; 700. and a water supplementing tank.

Detailed Description

In the following description, numerous details are provided to provide a thorough understanding of the utility model. However, it will be understood by those skilled in the art that the following description illustrates preferred embodiments of the utility model by way of example only and that the utility model may be practiced without one or more of these details. Furthermore, some technical features that are known in the art have not been described in detail in order to avoid obscuring the utility model.

In the following description, a detailed structure will be presented for a thorough understanding of embodiments of the present utility model. It will be apparent that embodiments of the utility model may be practiced without limitation to the specific details that are set forth by those skilled in the art. Preferred embodiments of the present utility model are described in detail below, however, the present utility model may have other embodiments in addition to these detailed descriptions.

An embodiment of the present utility model provides a water dispenser, as shown in fig. 1, having a water inlet 11 and a hot water outlet 12. By way of example and not limitation, the water dispenser may further include one or more of a normal temperature water outlet 13, a cold water outlet 14, and a drain outlet 15. The water inlet 11 of the water dispenser can be connected to the water outlet of the water purifier, and can also be connected to a water source such as barreled water, tap water and the like. The water dispenser may include a first instant heating unit 100, the first instant heating unit 100 including a first instant heating chamber and a heat pump 120. The heat pump 120 is used to heat the first instant heating chamber. The water dispenser may further include a second instant heating unit 200, and the second instant heating unit 200 may include a second instant heating chamber and an electric heating body (not shown). The electric heating body is used for heating the second instant heating cavity. Wherein, the first instant heating cavity and the second instant heating cavity are sequentially connected in series on the hot water pipeline 500 between the water inlet 11 and the hot water outlet 12. Currently, devices for heating water are generally classified into two types, water storage type and instant heating type. It will be appreciated that most of the hot water provided by the water storage heating means to the user is derived from the hot water stored in the water storage means. If the user takes hot water, the water level in the water storage device can gradually decrease until the water supply is stopped under the condition that the water storage device is not replenished with water with lower temperature. In another case, when the user takes hot water, water with a lower temperature is supplied to the water storage device. At this point the output water temperature will gradually decrease until it approaches the temperature of the make-up water. In contrast to water storage type heating devices, instant heating devices may include an instant heating chamber for sufficient heat exchange between the incoming water and the heating element. The instant heating device can continuously heat water with relatively constant flow and relatively low temperature into hot water with constant temperature. Furthermore, the instant heating chamber is usually of a small volume and may even be formed directly by a length of tubing capable of heat exchange with the heating element. With continued reference to fig. 1, the purified water from the water inlet 11 enters the first instant heating chamber, is heated by the heat pump 120, and is output to the second instant heating unit 200 for reheating. In the process of taking hot water, water with lower temperature is continuously replenished into the first instant heating cavity, but the heat pump 120 can ensure that the water output by the first instant heating cavity is maintained within a desired temperature range. Like the first instant heating unit 100, the second instant heating unit 200 may heat water having a relatively constant flow rate to hot water having a constant temperature. The difference from the first instant heating unit 100 is that the second instant heating unit 200 may employ electric heating, and the received water is the water having the higher temperature outputted from the first instant heating unit 100. The heat pump may be any of a variety of heat pumps known in the art, such as a semiconductor heat pump, or a mechanical heat pump that circulates a working medium between a cold end and a hot end by compressing the working medium. And can also be a device developed in the future, which can enable the temperature of the cold end to be reduced and the temperature of the hot end to be increased. The heat pump 120 shown in fig. 1 may transfer heat from the cold side to the first, i.e., hot, cavity of the hot side for heating purposes. By transferring heat from a heat source other than the heating target to the heating target, the heat pump can generally have a thermal efficiency of 300% or more, compared to a thermal efficiency of 100% or less using an electric heating device. It should be appreciated that the heat pump generates cold at the heat absorbing end when transferring heat, causing the temperature at the heat absorbing end to decrease, and at the heat releasing end, causing the temperature at the heat releasing end to increase. In practical applications, because work is required to transfer heat, the heat generated by the work should also be calculated into the heat of the heat absorbing end. In other words, the heat pump can achieve a heating effect above the conventional electric heating device 300w with a smaller power, for example, 100 w. Because the heat pump 120 has higher heat efficiency, the heat pump 120 is arranged at the upstream of the electric heating body, the heat pump 120 can heat normal-temperature water to a higher temperature first and then the electric heating body is used for heating, so that the overall power consumption of the water dispenser can be reduced, and hot water with larger flow rate can be provided. Also, the smaller the temperature difference between the heat absorbing and releasing ends of the heat pump 120, the higher the efficiency of the heat pump 120. If the first instant heating unit 100 is disposed downstream of the second instant heating unit 200, the heat pump 120 is required to heat the water in the first instant heating chamber to a higher temperature, and thus the temperature difference between the heat absorbing and discharging ends of the heat pump 120 is increased, thereby reducing the efficiency of the heat pump 120. Most of the current heat pumps 120 require a certain time to start, and when a user needs to take water, there is a vacuum period for taking hot water. Therefore, by providing the second instant heating unit 200, when the temperature of the hot water generated by the heat pump 120 is insufficient, the difference between the temperatures can be made up to a certain extent, and the instant heating of the hot water by the user can be ensured.

According to the technical scheme, compared with the existing heat pump type water dispenser in the market, the water dispenser disclosed by the application has the advantages that a larger water storage container is not needed, and the volume is smaller. The reason for this is that the instant heating device can continuously heat water having a relatively constant flow rate to constant temperature hot water, so that the first instant heating chamber and the second instant heating chamber, which are particularly large, are not required as long as the water source normally continuously supplies water, regardless of the first instant heating unit 100 or the second instant heating unit 200. Further, by providing the first instant heating unit 100 for heating by the heat pump 120 upstream of the second instant heating unit 200 for heating by the electric heater, it is possible to make full use of the feature that the heat pump 120 has higher thermal efficiency when the temperature difference is lower, and ensure that the heat pump 120 can heat the normal-temperature water having a larger flow rate into the preheated water having a larger temperature and then send the preheated water to the second instant heating unit 200. Thus, the water with larger flow and higher temperature can be output, even boiled water, without increasing the whole power. In addition, when the temperature of the hot water generated immediately after the heat pump 120 is started is insufficient, the second instant heating unit 200 can directly heat the normal-temperature water into boiled water, and at this time, the water flow can be reduced and/or the power of the second instant heating unit 200 can be increased, so that the hot water with the temperature close to the desired water intake temperature can be provided immediately when the user takes the hot water, and the user experience is good.

The heat pump may be, for example, the mechanical heat pump described above that transfers heat through a cyclical working fluid. With continued reference to fig. 1, the heat pump 120 may include an evaporator 121. The evaporator 121 corresponds to the heat absorbing end described above. The working fluid may absorb heat at evaporator 121 and change phase to a gaseous state. Corresponding to the evaporator 121, the heat pump 120 further comprises a condenser 122 which is heat exchangeable with the first instant heating chamber. The condenser 122 corresponds to the heat release end described above. The outlet of the evaporator 121 communicates with the inlet 1221 of the condenser 122 via a first pipe section 123. The outlet 1222 of the condenser 122 communicates with the inlet of the evaporator 121 via a second line segment 124. In this way, the working medium can circulate in the line between the evaporator 121 and the condenser 122 with almost no loss. A compressor 125 is disposed on the first pipe section 123, and the compressor 125 can compress the working medium that absorbs heat and changes phase into gas state in the evaporator 121 into high-temperature and high-pressure gas, releases heat through the condenser 122, changes phase into low-temperature liquid state, and flows back to the evaporator 121, thereby completing the circulation of the working medium in the pipe. In an embodiment not shown, the working medium may also be circulated in the pipeline in gaseous form all the time without undergoing a phase change. Preferably, the working fluid may be a refrigerant that is present or may occur in the future, including but not limited to R11, R12, etc. An expansion valve 128 may also be provided on the second pipe section 124. The expansion valve 128 comprises a temperature sensing probe which is arranged at the outlet of the evaporator 121, the opening of the valve is controlled according to the superheat degree of the working medium, and when the temperature at the outlet of the evaporator 121 is too high, the opening of the expansion valve 128 is increased to increase the flow rate of the working medium entering the evaporator 121; when the temperature at the outlet of the evaporator 121 is too low, the opening degree of the expansion valve 128 is reduced to reduce the flow rate of the working medium entering the evaporator 121, thereby automatically controlling the refrigeration efficiency of the evaporator 121 and further automatically controlling the temperature.

In the technical scheme, the mechanical heat pump is adopted, the service life of the mechanical heat pump is longer than that of the semiconductor heat pump, the maintenance cost is lower, the refrigerating efficiency is high, and the user experience can be improved.

Illustratively, the water dispenser may further have a cold water outlet 14, and the water dispenser may further include a cold tank 300 connected between the water inlet 11 and the cold water outlet 14, the evaporator 121 being heat-exchangeable with the cold tank 300. The heat pump 120 of the water dispenser may supply the generated cold amount to the cold tank 300 while heating, thereby generating cold water. For a suitable environment of a water dispenser, the heat source is usually only air. Therefore, existing heat pump water dispensers typically transfer heat from the air to the water. The specific heat capacity of water is greater than that of air, and more heat can be provided than that of air with the same temperature reduced. Thus, as can be seen with continued reference to fig. 1, transferring heat from the water in the cold tank 300 to the water in the first instant heating cavity not only allows for faster hot water production, but also provides cold water in the cold tank 300 to the user through the cold water outlet 14, enriching the user experience.

Not shown, the outer layer of the cold tank 300 may be provided with an insulation layer to prevent the cold tank 300 and cold water therein from exchanging heat with air, avoiding the need to refrigerate again when the temperature rises, and wasting energy.

Illustratively, the water dispenser may further include a cooling fan. The user may only need cold water; or cold water and hot water are taken at the same time, but the cold energy of the cold water required by the preparation is far greater than the heat energy of the hot water required by the preparation; or for other reasons it is desirable to reduce the temperature of the first instant heating chamber. If the above technical solution is adopted, most of the heat of the cold water is transferred to the water in the first instant heating cavity, which may result in that the obtained water temperature is too high when the user takes the hot water later. Even the water temperature in the first instant heating cavity is too high to boil, so that the pressure in the pipeline is increased, unsafe factors are generated, and the user experience is influenced. Moreover, the excessively high temperature of the condenser 122 may cause a large temperature difference with the evaporator 121, reducing the efficiency of the heat pump 120, and affecting the refrigeration effect. Therefore, a heat radiation fan can be provided. In one embodiment, the cooling fan may include a first cooling fan 126, and an air outlet end of the first cooling fan 126 may face the condenser 122. In this way, the air can be passed through the condenser 122 by the first cooling fan 126 to remove the generated heat, so as to control the temperature of the water in the first instant heating cavity not to be too high. In another embodiment, a first air heat exchanger (not shown) may be provided on the first pipe section 123, and the cooling fan may include a second cooling fan (not shown). The air outlet end of the second cooling fan can face the first air heat exchanger. As shown in fig. 1, the superheated working substance output from the compressor 125 may dissipate heat through the first air heat exchanger before reaching the condenser 122, and the working substance with reduced temperature enters the condenser 122, so that the water temperature in the first instant heating cavity is not excessively high.

In summary, the cooling fan is disposed, and the air outlet end of the cooling fan faces the condenser 122 or faces the first air heat exchanger disposed on the first pipe section 123, so that the water temperature in the first instant heating cavity can be effectively prevented from being too high. In the case where the evaporator 121 is used to cool the cold tank 300, the cooling efficiency can also be improved.

Of course, embodiments of the present utility model also do not exclude embodiments that include both the first cooling fan 126 with its air outlet end facing the condenser 122 and the second cooling fan with its air outlet end facing the first air heat exchanger. Alternatively, the first heat dissipation fan 126 and the second heat dissipation fan may be integrated.

Illustratively, the water dispenser may further include a heat absorbing fan. In one embodiment, the heat absorbing fan may include a first heat absorbing fan 127, and an air outlet end of the first heat absorbing fan 127 may face the evaporator 121. Since water may be frozen at a temperature lower than 0 degrees celsius, damage may be caused by freezing in the cold tank 300. Therefore, if the amount of hot water required by the user is large, air may be introduced into the evaporator 121 through the first heat absorption fan 127, raising the temperature of the evaporator 121, thereby preventing the water temperature from being excessively low, resulting in freezing of the cold tank 300. At the same time, air having a relatively high temperature is introduced so that the temperature of the evaporator 121 is not too low, and the heating efficiency of the heat pump 120 is also improved. In another embodiment, a second air heat exchanger may be disposed on the second duct section 124 and the heat absorption fan may include a second heat absorption fan. The air outlet end of the second heat absorption fan can face the second air heat exchanger. The working fluid with lower temperature output from the condenser 122 may absorb heat through the second air heat exchanger on the second pipe section 124, and the working fluid with increased temperature enters the evaporator 121, so that water in the cold tank 300 may be prevented from freezing.

In summary, the heat absorption fan is disposed, and the air outlet end of the heat absorption fan faces the evaporator 121 or faces the second air heat exchanger disposed on the second pipe section 124, so that the too low freezing of the water temperature in the cold tank 300 can be effectively avoided, and the heating efficiency can be improved.

Of course, embodiments of the present utility model also do not exclude embodiments that include both the first heat absorption fan 127 with its air outlet end facing the evaporator 121 and the second heat dissipation fan with its air outlet end facing the second air heat exchanger. Alternatively, the first heat absorbing fan 127 and the second heat absorbing fan may be integrated.

Illustratively, as shown in fig. 1, the first instant heating unit 100 may include an instant container 110, with the space within the instant container 110 forming a first instant cavity. It will be appreciated that the rate of heat exchange is positively correlated to the contact area. By way of example and not limitation, to provide for more adequate heat exchange of the condenser 122 of the heat pump 120 with the water of the first instant heating chamber, an instant heating reservoir 110 may be provided, with the condenser 122 being disposed within the first instant heating chamber in the instant heating reservoir 110. The water in the instant heating container 110 is always full, so that the water to be heated and the condenser 122 can be ensured to have sufficient contact area all the time, and the heating efficiency is improved. The volume of the instant heating container 110 is much smaller than the volume of the heat storage type heating chamber. In other embodiments, the instant heating container 110 may be made of a heat conducting material, and the condenser 122 may be a coil coiled on the instant heating container 110 or welded with the instant heating container 110, which may be capable of effectively transferring heat to the instant heating container 110. The inner surface of the instant heating container 110 has a large contact area with water therein, so that heating efficiency can be ensured as well.

An insulation layer may be provided on the outer layer of the instant heating container 110, not shown, to prevent the instant heating container 110 from exchanging heat with air and reduce heat dissipation.

Illustratively, the volume of the hot vessel 110 may be less than or equal to 1 liter. It will be appreciated that the same amount of heat, the greater the heated water mass, the slower the temperature rise. If the volume of the instant heating container 110 is more than 1 liter, it is difficult to rapidly heat the water to a high temperature with respect to the heating capacity of the heat pump 120, and the user's demand for the instant heating is not satisfied. Preferably, with continued reference to FIG. 1, the water outlet 112 of the hot reservoir 110 may be located at the top thereof. Since the instant heating container 110 needs to be kept full of water all the time, the constant temperature of the water can be realized through simpler control. Therefore, if the water outlet is below, water in the instant heating container 110 may not be filled up, affecting the heating effect, and even causing dry heating. On the other hand, since the specific gravity of hot water and cold water is different, the cold water is sunk below and the hot water floats above. Therefore, the water inlet 111 of the instant heating container 110 may be disposed below, and the water outlet 112 may be disposed at the top, and stability of the output water temperature may be ensured to some extent.

As illustrated in fig. 2 and 3, the first instant heating unit 100 may include an inner tube 130 and an outer tube 140 sleeved on the inner tube 130, for example. Outer tube 140 and inner tube 130 are spaced apart and form interlayer 150. One of the inner tube 130 and the interlayer 150 may form a first instant heating cavity. The other of the inner tube 130 and the interlayer 150 may form the condenser 122. The working fluid and water to be heated may leave the first instant heating unit 100 after passing through the inner tube 130 and the interlayer 150, respectively. Specifically, the inner tube 130 may be used as a first instant heating cavity, the interlayer 150 is used as the condenser 122, and the water to be heated passes through the inner tube 130 to exchange heat with the working medium in the interlayer 150, and the temperature is increased. Alternatively, as shown in fig. 2 and 3, the inner tube 130 may act as the condenser 122 and the interlayer 150 may act as the first instant heating chamber. Both ends of the inner tube 130 may protrude outside the outer tube 140, respectively, forming an inlet 1221 of the condenser and an outlet 1222 of the condenser. Both ends of the outer tube 140 may be outwardly protruded with a water inlet port 151 and a water outlet port 152, respectively, to form a water inlet and a water outlet of the first instant heating chamber. In this embodiment, the heat generated by the condenser 122 may be transferred to the water of the outer tube for a greater portion, and less heat may be dissipated to the air for a greater heating efficiency than in the embodiment in which the interlayer 150 is used as the condenser 122. By adopting the design of the inner layer tube 130 and the outer layer tube 140, the contact area between the working medium and water can be greatly increased, so that the heating is more sufficient and the efficiency is higher. The problem of cold and hot water interference can also be avoided, and the water outlet temperature is more stable.

The outside of the outer tube 140 may be covered with a heat insulating layer, not shown, to avoid heat exchange with air and reduce heat dissipation.

Illustratively, the water dispenser may further include a flow-adjustable pumping device 510. The pumping means 510 with adjustable flow may be arranged on the hot water line between the water inlet 11 and the first instant heating chamber or on the hot water line 500 between the first instant heating chamber and the second instant heating chamber. As shown in fig. 1, the pumping means 510 is arranged on the line between the first instant heating chamber and the second instant heating chamber. By providing the pumping means 510, the flow rate of water passing through the first instant heating chamber and the second instant heating chamber can be regulated, thereby stably providing a large flow rate of hot water to the user. The flow-adjustable pumping device 510 may include any suitable pumping device such as a diaphragm pump, a centrifugal pump, or the like. The flow rate can be adjustable in steps or continuously adjustable. In embodiments where the water inlet is connected to a water outlet of a water purifier or to a water source such as barreled water, the water pressure at the water inlet may be relatively low, and the pumping means may be relied upon to deliver water at a steady flow rate to the first and second instant heating chambers to ensure that the heating function of both can heat these water to the desired temperature respectively. In other embodiments, not shown, a water purifier or tap water may provide pressurized water to the water inlet of the water dispenser. At this time, the flow-adjustable pumping device can control the output flow of the water inlet under the condition that the water inlet has pressure. The water dispenser may further include a controller (not shown) for adjusting the output flow rate of the pumping device 510, the power of the heat pump 120, and/or the power of the electric heater according to a desired water intake temperature. Because of the time required for starting the heat pump 120, and because of the limitation of power, the electric heater can only heat the rated flow of water to the desired intake temperature at the rated power. In the embodiment shown in fig. 1, the controller may control the electric heating body to operate at a rated power according to the water intake temperature desired by the user, and control the flow-adjustable pumping device 510 to supply hot water to the user at a water flow rate not higher than the rated flow rate. Of course, the rated flow may vary depending on the temperature of the water the user desires to take. In summary, the rated flow is the flow of water at which the electrical heating body is rated to be able to heat the water to the desired water intake temperature. After the heat pump 120 is started and is operating normally, the controller may adjust one or more of the output flow of the pumping device 510, the power of the heat pump 120, and the power of the electric heater according to the user's desired water intake temperature. Illustratively, the water dispenser may provide hot water at 45 degrees, 65 degrees, 85 degrees, and boiled water to the user. Taking 65 degrees hot water as an example, the controller may control the heat pump 120 to heat the water in the first instant heating chamber to 60 degrees first, and then to heat the water in the first instant heating chamber to a small extent through the second instant heating unit 200, so as to provide 65 degrees hot water to the user. The controller may control the heat pump 120 to reduce power, or open a temperature reducing electromagnetic valve (not shown), etc. to control the temperature of the water in the first instant heating cavity. In other embodiments, not shown, the temperature of the output hot water may also be controlled by adjusting the flow rate output by the pumping means only.

In the technical scheme, the water dispenser can accurately control the water temperature of the hot water conveyed to the user from the beginning of water taking of the user to the end of water taking, and the hot water can be continuously supplied.

In the above embodiment, the water source may supplement water to the water inlet 11 by only gravity, or may supply water having pressure to the water inlet 11. In another set of embodiments, as shown in FIG. 4, a water dispenser may include a filter assembly 400 and a zero pressure valve 520. The same reference numerals are used for the same or similar components in the embodiment shown in fig. 4 as in the embodiment shown in fig. 1, and only the different parts will be described in detail herein.

Illustratively, as shown in fig. 4, the water dispenser may further include a filter assembly 400', the purified water outlet of the filter assembly 400' being communicated to the water inlet 11. The filter assembly 400' may include various types of filter cartridges. Illustratively, the filter assembly 400' may include, for example, a reverse osmosis filter element, an ultrafiltration filter element, a nanofiltration filter element, or a composite filter element of any two or more thereof. For reverse osmosis and nanofiltration cartridges, the water needs to be pressurized before entering the cartridge, in which case the filter assembly may also include a booster pump. In the embodiment shown in fig. 4, the filter assembly 400' may include a booster pump 420 and a reverse osmosis filter cartridge 430 connected in series. The water inlet 401 of the filter assembly 400' may receive raw water, such as tap water. Optionally, the water dispenser may further include a pre-filter cartridge 600, and the pre-filter cartridge 600 may be connected to the water inlet 401 of the filter assembly 400' for pre-filtering water entering the filter assembly 400' to extend the service life of the filter assembly 400 '.

The filter assemblies can be classified into a large flux filter assembly, which means a filter assembly having a daily water yield of 400 gallons or more, and a small flux filter assembly according to the water production capacity. The large flux filter assembly can be manufactured on site to provide clean water for users rapidly, and the small flux filter assembly stores the manufactured clean water into the water tank in a period of time when the users do not get water, and supplies water to the users from the water tank. When the water required by the user is large, the large-flux filter assembly can continuously provide large-flux purified water for the user, and the small-flux filter assembly can only supply water for the user with small flux after the water tank is emptied.

In the above technical solution, the filter assembly 400' may filter raw water, then deliver the filtered raw water to the water inlet 11, and then heat the filtered raw water to a desired water intake temperature through the first and second instant heating units 100 and 200, and then provide the filtered raw water to a user. Thus, the water dispenser can continuously and largely provide the purified water with the expected water taking temperature for users, and the user experience is better.

Illustratively, with continued reference to FIG. 4, the water dispenser may further include a return line 440, with the water inlet of the return line 440 being connected to the water inlet 11 and the water outlet of the return line 440 being connected to the water inlet 401 of the filter assembly 400'. The filter assembly 400 'may employ a large flux filter assembly 400'. A return valve 450 may be provided in the return line 440. The return valve 450 is used for returning the purified water produced by the reverse osmosis filter element 430 to the water inlet 401 of the filter assembly 400' when the pipeline pressure of the water inlet 11 is greater than a preset pressure. Illustratively, the return valve 450 may be a one-way valve that automatically opens when a predetermined water pressure is reached. The return valve 450 is opened in a direction from the outlet of the reverse osmosis cartridge 430 to the inlet 401 of the filter assembly 400'. The water flow rate in the pipeline where the water inlet 11 is located depends on the pumping device 510 with adjustable flow rate, when the flow rate pumped by the pumping device 510 is smaller than the water flow rate of the water making flow of the filter assembly 400, the pressure of the pipeline at the rear section of the filter assembly 400 is increased, and in order to protect the filter assembly 400, the return pipeline 440 can return excessive clean water to the booster pump 420 to participate in water making again. Thus, the system pressure can be effectively reduced. If a low flux filter assembly is used, the above-described problem of excessive pressure is eliminated, and the return line 440 and the return valve 450 are not required. In addition, the high-flux filtering device can meet the requirement of users on high-flux continuous hot water, and user experience is improved.

Illustratively, as shown in fig. 4, the pumping device 510 is disposed on a pipeline between the water inlet 11 and the first instant heating chamber, and the water dispenser may further include a zero-pressure valve 520, and the zero-pressure valve 520 may be disposed between the water inlet 11 and the pumping device 510. In some embodiments, pumping device 510 may employ a diaphragm pump. When the water at the water inlet of the diaphragm pump has pressure, the water flow pumped by the diaphragm pump can be affected by the pressure, and the water flow is not accurate any more. Thus, a zero pressure valve 520 may be provided at the water inlet of the pumping device 510, thereby enabling a more accurate adjustment of the water flow rate by the pumping device 510.

Illustratively, referring back to fig. 1, where the pumping device 510 is disposed on the line between the first and second instant heating chambers, the water dispenser may further include a water replenishment tank 700, and the water replenishment tank 700 may be communicated between the purified water outlet and the water inlet 11 of the filter assembly 400. The make-up tank 700 may be located above the first instant heating chamber. The water replenishment tank 700 may rely on gravity to supply water to the water inlet 11. Because of the high cost of large flux filter assemblies, users typically choose to use small flux filter assemblies. To obtain a larger volume of hot water, a make-up tank 700 may be provided in the water dispenser, with the make-up tank 700 being filled with a small flux of filter assembly when water is not being drawn. Of course, the water replenishing tank 700 may be externally arranged on the water dispenser body. The water supplementing tank 700 can quickly supplement purified water to the water inlet 11, and water is supplemented by gravity, so that the cost is low.

Illustratively, with continued reference to FIG. 1, the water dispenser may further include a flow meter 530. A flow meter 530 may be provided on the hot water pipe 500 between the water inlet 11 and the hot water outlet 12. Since both the first and second instant heating units 100 and 200 are instant heating type, the flow rates at the respective portions between the water inlet 11 and the hot water outlet 12 are substantially uniform or related. The flow meter 530 may be electrically connected to a controller, which may also be used to adjust the output flow rate of the pumping device 510 based on the detection result of the flow meter 530. Illustratively, the flow meter 530 may be located upstream of the pumping device 510. Alternatively, the flow meter 530 may be located downstream of the pumping device 510. Typically, the pumping device adopted in engineering can only control the pumping flow rate within a certain range, and the output flow rate may deviate due to various factors, that is, the output flow rate of the pumping device 510 may be adjusted, but there may be a certain fluctuation. Accordingly, the flow meter 530 may be configured to precisely determine the flow rate, forming a closed loop control with the pumping device 510, to achieve precise regulation of the flow rate of the hot water. In the illustrated embodiment, the flow meter 530 may be provided at a water inlet connected to the second instant heating unit 200. That is, the flow meter 530 may be disposed between the first and second instant heating units 100 and 200 and closer to the second instant heating unit 200 than the pumping device 510. Like this, can detect the flow that enters into second instant heating unit 200 accurately, and then can control the power of second instant heating unit 200 accurately, and then realize the purpose of accurate accuse temperature. In other embodiments, the flow-adjustable pumping device 510 may be a pumping device with precisely controlled flow output, and can precisely control the output flow according to the input signal, so as to control the output of hot water. In this case, the flow meter may be omitted.

Illustratively, the water dispenser may further include a temperature sensor assembly, which may include a first temperature sensor 113 for detecting the water temperature within the first instant heating cavity, a second temperature sensor for detecting the water temperature within the second instant heating cavity, a third temperature sensor 540 for detecting the water temperature within the conduit between the first instant heating cavity and the second instant heating cavity, and/or a fourth temperature sensor 550 for detecting the water temperature within the conduit downstream of the second instant heating cavity. In some embodiments, the control of temperature may be calculated from water flow and heating power. However, due to factors such as possible fluctuation of the temperature of the inlet water, errors of equipment and the like, the output water temperature can have larger errors than the expected water taking temperature. Therefore, a temperature sensor may be provided to detect the temperature at various points in the waterway and feed back the detected temperature to the controller. The controller may be used to adjust the output flow of the pumping device 510, the power of the heat pump 120, and/or the power of the electrical heater in real time based on the temperature measured by the temperature sensor assembly. Thereby ensuring that the temperature of the output hot water is more accurate.

Illustratively, the water dispenser may further include a heating tap, in which case the second instant heating unit 200 may be disposed in the heating tap to heat water from the first instant heating unit 100. Typically, the heating faucet exists independently of other parts of the water dispenser, which may be referred to as a host, which is typically enclosed within a relatively closed housing. The provision of the second instant heating unit 200 on the heating faucet has the following benefits compared to the embodiment in which the second instant heating unit 200 is built into the host: the water can reach the water taking container of the user immediately after being heated, and the heat loss caused by longer transmission process can be avoided; the second instant heating unit 200 hardly retains water having a low temperature, and substantially all of the water which is taken in by the user is hot water having a desired water taking temperature; if the second instant heating unit 200 malfunctions, maintenance replacement is easier. Part of the heating faucet is a standard part, and can be directly purchased and replaced when damaged.

In the above embodiments, the controller may be implemented by using electronic components such as a timer, a comparator, a register, and a digital logic circuit, or by using a processor chip such as a single chip, a microprocessor, a Programmable Logic Controller (PLC), a Digital Signal Processor (DSP), a Field Programmable Gate Array (FPGA), a Programmable Logic Array (PLA), an Application Specific Integrated Circuit (ASIC), and peripheral circuits thereof.

In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front", "rear", "upper", "lower", "left", "right", "transverse", "vertical", "horizontal", and "top", "bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely for convenience of describing the present utility model and simplifying the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, without limiting the scope of protection of the present utility model; the orientation terms "inner" and "outer" refer to the inner and outer relative to the outline of the components themselves.

For ease of description, regional relative terms, such as "over … …," "over … …," "on the upper surface of … …," "over," and the like, may be used herein to describe regional positional relationships of one or more components or features to other components or features shown in the figures. It will be understood that the relative terms of regions include not only the orientation of the components illustrated in the figures, but also different orientations in use or operation. For example, if the element in the figures is turned over entirely, elements "over" or "on" other elements or features would then be included in cases where the element is "under" or "beneath" the other elements or features. Thus, the exemplary term "above … …" may include both orientations "above … …" and "below … …". Moreover, these components or features may also be positioned at other different angles (e.g., rotated 90 degrees or other angles), and all such cases are intended to be encompassed herein.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, components, assemblies, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein.

The present utility model has been illustrated by the above-described embodiments, but it should be understood that the above-described embodiments are for purposes of illustration and description only and are not intended to limit the utility model to the embodiments described. In addition, it will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that many variations and modifications are possible in light of the teachings of the utility model, which variations and modifications are within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (16)

1. A water dispenser having a water inlet and a hot water outlet, the water dispenser comprising:

The system comprises a first instant heating unit, a second instant heating unit and a heat pump, wherein the first instant heating unit comprises a first instant heating cavity and the heat pump is used for heating the first instant heating cavity; and

A second instant heating unit including a second instant heating cavity and an electric heater for heating the second instant heating cavity,

The first instant heating cavity and the second instant heating cavity are sequentially connected in series on a hot water pipeline between the water inlet and the hot water outlet.

2. The water dispenser of claim 1, wherein the heat pump comprises:

an evaporator;

The condenser is in heat exchange with the first instant heating cavity, the outlet of the evaporator is communicated with the inlet of the condenser through a first pipeline section, and the outlet of the condenser is communicated with the inlet of the evaporator through a second pipeline section; and

A compressor disposed on the first pipe section.

3. The water dispenser of claim 2, further comprising a cooling fan, the cooling fan comprising:

The air outlet end of the first cooling fan faces the condenser; and/or

The second cooling fan is arranged on the first pipeline section, and the air outlet end of the second cooling fan faces the first air heat exchanger.

4. The water dispenser of claim 2, further comprising a heat absorbing fan, the heat absorbing fan comprising:

the air outlet end of the first heat absorption fan faces the evaporator; or alternatively

The second heat absorption fan is arranged on the second pipeline section, and the air outlet end of the second heat absorption fan faces the second air heat exchanger.

5. The water dispenser of claim 2 further comprising a cold water outlet, the water dispenser further comprising a cold tank connected between the water inlet and the cold water outlet,

The evaporator is in heat exchange with the cold tank.

6. The water dispenser according to claim 2, wherein the first instant heating unit comprises an inner tube and an outer tube sleeved on the inner tube, the outer tube and the inner tube being spaced apart and forming an interlayer,

One of the inner tube and the interlayer forms the first instant heating cavity, and the other of the inner tube and the interlayer forms the condenser.

7. The water dispenser of claim 1, wherein the first instant heating unit comprises an instant heating container, a space within the instant heating container forming the first instant heating cavity.

8. The water dispenser of claim 7, wherein,

The volume of the instant heating container is less than or equal to 1 liter; and/or

The water outlet of the instant heating container is positioned at the top of the instant heating container.

9. The water dispenser of claim 1, further comprising a filter assembly, wherein a purified water outlet of the filter assembly is connected to the water inlet.

10. The water dispenser of claim 9, further comprising:

The pumping device is arranged on a hot water pipeline between the water inlet and the first instant heating cavity or a hot water pipeline between the first instant heating cavity and the second instant heating cavity; and

And the controller is used for adjusting the output flow of the pumping device, the power of the heat pump and/or the power of the electric heating body according to the expected water taking temperature.

11. The water dispenser according to claim 10, wherein in case the pumping means is provided on a pipe between the water inlet and the first instant heating chamber,

The water dispenser further comprises a zero-pressure valve, and the zero-pressure valve is arranged between the water inlet and the pumping device; and/or

The water dispenser further comprises a return pipeline, a water inlet of the return pipeline is connected to the water inlet, and a water outlet of the return pipeline is connected to a water inlet of the filtering assembly.

12. The water dispenser of claim 10 wherein, with the pumping means disposed on the line between the first instant heating chamber and the second instant heating chamber,

The water dispenser further comprises a water supplementing tank, wherein the water supplementing tank is communicated between the water purifying outlet of the filtering assembly and the water inlet, and the water supplementing tank is located above the first instant heating cavity.

13. The water dispenser according to claim 10, further comprising a flow meter disposed on the hot water line between the water inlet and the hot water outlet, the flow meter being electrically connected to the controller, the controller further being configured to adjust the output flow rate of the pumping device according to a detection result of the flow meter.

14. The water dispenser of claim 13, wherein the flow meter is disposed between the first instant heating unit and the second instant heating unit and is closer to the second instant heating unit than the pumping device.

15. The water dispenser of claim 10 further comprising a temperature sensor assembly including a first temperature sensor for detecting water temperature in the first instant heating chamber, a second temperature sensor for detecting water temperature in the second instant heating chamber, a third temperature sensor for detecting water temperature in a conduit between the first instant heating chamber and the second instant heating chamber, and/or a fourth temperature sensor for detecting water temperature in a conduit downstream of the second instant heating chamber,

The controller is also used for adjusting the output flow of the pumping device, the power of the heat pump and/or the power of the electric heating body according to the water temperature measured by the temperature sensor assembly.

16. The water dispenser of claim 1 further comprising a heating faucet, the second instant heating unit being disposed in the heating faucet.